Yeah those ones I got, I mean for some of the initial buildings that didn't require stars, had to press E a few times to get them to be purchasable
Viewing post in Interglorpital Park jam comments
I'm guessing the bug they're talking about is that there's no "can purchase" detection
If you have 25 money and something costs 30 money, if you have that item selected in the shop, and you get to 30 money, it doesn't become purchasable until you unselect and reselect that shop item (it only updates the "can buy" variable when you select the item in the shop)